diff --git a/docs/Config_Reference.md b/docs/Config_Reference.md
index 780d5707..3763aaf8 100644
--- a/docs/Config_Reference.md
+++ b/docs/Config_Reference.md
@@ -2616,10 +2616,19 @@ PCA9632 LED support. The PCA9632 is used on the FlashForge Dreamer.
 
 ```
 [pca9632 my_pca9632]
-scl_pin:
-#   The SCL "clock" pin. This parameter must be provided.
-sda_pin:
-#   The SDA "data" pin. This parameter must be provided.
+#i2c_address: 98
+#   The i2c address that the chip is using on the i2c bus. This may be
+#   96, 97, 98, or 99.  The default is 98.
+#i2c_mcu:
+#i2c_bus:
+#i2c_speed:
+#   See the "common I2C settings" section for a description of the
+#   above parameters.
+#scl_pin:
+#sda_pin:
+#   Alternatively, if the pca9632 is not connected to a hardware I2C
+#   bus, then one may specify the "clock" (scl_pin) and "data"
+#   (sda_pin) pins. The default is to use hardware I2C.
 #initial_RED: 0.0
 #initial_GREEN: 0.0
 #initial_BLUE: 0.0
diff --git a/klippy/extras/pca9632.py b/klippy/extras/pca9632.py
index a5659cfe..2016b006 100644
--- a/klippy/extras/pca9632.py
+++ b/klippy/extras/pca9632.py
@@ -3,7 +3,7 @@
 # Copyright (C) 2022  Ricardo Alcantara <ricardo@vulcanolabs.com>
 #
 # This file may be distributed under the terms of the GNU GPLv3 license.
-from . import mcp4018
+from . import bus, mcp4018
 
 BACKGROUND_PRIORITY_CLOCK = 0x7fffffff00000000
 
@@ -25,7 +25,10 @@ PCA9632_WHT = 0x06
 class PCA9632:
     def __init__(self, config):
         self.printer = printer = config.get_printer()
-        self.i2c = mcp4018.SoftwareI2C(config, 98)
+        if config.get("scl_pin", None) is not None:
+            self.i2c = mcp4018.SoftwareI2C(config, 98)
+        else:
+            self.i2c = bus.MCU_I2C_from_config(config, default_addr=98)
         self.prev_regs = {}
         pled = printer.load_object(config, "led")
         self.led_helper = pled.setup_helper(config, self.update_leds, 1, True)